spray-websocket doesn't use the actual ActorSystem configuration but loads "application.conf" regardless of it

[pangiole]

Please, consider the following scenario:

• users could decide to create their ActorSystem passing a Config object different than the application.conf simply because Akka allows it:

implicit val system = ActorSystem("mySystem", ConfigFactory.load("mySystem.conf"))

• spray-websocket package object is actually loading the default application.conf file regardless the above decision and without considering the ActorySystem could have been configured with a different Config object

package object websocket {

  val config = ConfigFactory.load().getConfig("spray.websocket")
  // ...
}

• That will certainly lead to a misconfiguration making users notice unexpected behaviour of spray-websocket